Dining arm chair



FIG. 1 is a perspective view of a dining arm chair showing my design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right elevation side view, the left elevation side view being a mirror image;

FIG. 4 is a back elevation view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a dining arm chair, as shown and described. 